/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.db.integration;

import org.apache.iotdb.commons.exception.ConfigurationException;
import org.apache.iotdb.commons.file.SystemFileFactory;
import org.apache.iotdb.db.conf.IoTDBDescriptor;
import org.apache.iotdb.db.conf.IoTDBStartCheck;
import org.apache.iotdb.db.localconfignode.LocalConfigNode;
import org.apache.iotdb.db.utils.EnvironmentUtils;
import org.apache.iotdb.itbase.category.LocalStandaloneTest;
import org.apache.iotdb.tsfile.common.conf.TSFileConfig;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;

import java.io.*;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

import static org.junit.Assert.*;

@Category({LocalStandaloneTest.class})
public class IoTDBCheckConfigIT {
    private File propertiesFile =
            SystemFileFactory.INSTANCE.getFile(
                    IoTDBDescriptor.getInstance().getConfig().getSchemaDir()
                            + File.separator
                            + "system.properties");

    private Map<String, String> systemProperties = new HashMap<>();

    private Properties properties = new Properties();

    private PrintStream console = null;
    private ByteArrayOutputStream bytes = null;

    @Before
    public void setUp() {
        EnvironmentUtils.envSetUp();

        bytes = new ByteArrayOutputStream();
        console = System.out;
        System.setOut(new PrintStream(bytes));

        systemProperties.put("partition_interval", "9223372036854775807");
        systemProperties.put("timestamp_precision", "ms");
        systemProperties.put("tsfile_storage_fs", "LOCAL");
        systemProperties.put("enable_partition", "false");
        systemProperties.put("max_degree_of_index_node", "256");
        systemProperties.put("tag_attribute_total_size", "700");
        systemProperties.put("iotdb_version", "0.13.0");
        systemProperties.put("virtual_storage_group_num", "1");
    }

    @After
    public void tearDown() throws Exception {
        EnvironmentUtils.cleanEnv();
        systemProperties.clear();
        properties.clear();
        System.setOut(console);
    }

    @Test
    public void testSaveTimeEncoderToSystemProperties() throws Exception {
        IoTDBStartCheck.getInstance().checkSystemConfig();
        // read properties from system.properties
        try (FileInputStream inputStream = new FileInputStream(propertiesFile);
             InputStreamReader inputStreamReader =
                     new InputStreamReader(inputStream, TSFileConfig.STRING_CHARSET)) {
            properties.load(inputStreamReader);
        }
        String timeEncoder = (String) properties.get("time_encoder");
        assertFalse(timeEncoder.isEmpty());
    }

    @Test
    public void testAlterTimeEncoderAfterStartService() throws Exception {
        EnvironmentUtils.shutdownDaemon();
        EnvironmentUtils.stopDaemon();
        LocalConfigNode.getInstance().clear();
        systemProperties.put("time_encoder", "REGULAR");
        writeSystemFile();
        EnvironmentUtils.reactiveDaemon();
        try {
            IoTDBStartCheck.getInstance().checkSystemConfig();
        } catch (ConfigurationException t) {
            t.printStackTrace();
            assertEquals("time_encoder", t.getParameter());
            assertEquals("REGULAR", t.getCorrectValue());
            return;
        }
        fail("should detect configuration errors");
    }

    @Test
    public void testSameTimeEncoderAfterStartService() throws Exception {
        EnvironmentUtils.shutdownDaemon();
        EnvironmentUtils.stopDaemon();
        LocalConfigNode.getInstance().clear();
        systemProperties.put("time_encoder", "TS_2DIFF");
        writeSystemFile();
        EnvironmentUtils.reactiveDaemon();
        try {
            IoTDBStartCheck.getInstance().checkSystemConfig();
        } catch (Throwable t) {
            fail(t.getMessage());
        }
    }

    private void writeSystemFile() throws IOException {
        // write properties to system.properties
        try (FileOutputStream outputStream = new FileOutputStream(propertiesFile)) {
            systemProperties.forEach((k, v) -> properties.setProperty(k, v));
            properties.store(outputStream, "System properties:");
        }
    }
}
